{"id":153909,"date":"2024-11-02T11:22:20","date_gmt":"2024-11-02T03:22:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/153909\/"},"modified":"2024-11-02T11:22:21","modified_gmt":"2024-11-02T03:22:21","slug":"%e7%95%b6%e5%89%8doracle%e7%b3%bb%e7%b5%b1%e6%99%82%e9%96%93%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/153909\/","title":{"rendered":"\u7576\u524dOracle\u7cfb\u7d71\u6642\u9593\u7684\u67e5\u8a62\u65b9\u6cd5"},"content":{"rendered":"<h1 id=\"%e7%95%b6%e5%89%8doracle%e7%b3%bb%e7%b5%b1%e6%99%82%e9%96%93%e7%9a%84%e6%9f%a5%e8%a9%a2%e6%96%b9%e6%b3%95-OkjVMOivcG\">\u7576\u524dOracle\u7cfb\u7d71\u6642\u9593\u7684\u67e5\u8a62\u65b9\u6cd5<\/h1>\n<p>\u5728\u4f7f\u7528Oracle\u6578\u64da\u5eab\u6642\uff0c\u4e86\u89e3\u7cfb\u7d71\u6642\u9593\u662f\u975e\u5e38\u91cd\u8981\u7684\uff0c\u56e0\u70ba\u5b83\u5f71\u97ff\u5230\u6578\u64da\u7684\u6642\u9593\u6233\u8a18\u3001\u65e5\u8a8c\u8a18\u9304\u4ee5\u53ca\u8a31\u591a\u57fa\u65bc\u6642\u9593\u7684\u64cd\u4f5c\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5e7e\u7a2e\u67e5\u8a62Oracle\u7cfb\u7d71\u6642\u9593\u7684\u65b9\u6cd5\uff0c\u5e6b\u52a9\u7528\u6236\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u4f7f\u7528\u6578\u64da\u5eab\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8sysdate%e5%87%bd%e6%95%b8-OkjVMOivcG\">1. \u4f7f\u7528SYSDATE\u51fd\u6578<\/h2>\n<p>Oracle\u63d0\u4f9b\u4e86\u4e00\u500b\u5167\u5efa\u7684\u51fd\u6578SYSDATE\uff0c\u53ef\u4ee5\u7528\u4f86\u7372\u53d6\u7576\u524d\u7684\u7cfb\u7d71\u65e5\u671f\u548c\u6642\u9593\u3002\u9019\u500b\u51fd\u6578\u8fd4\u56de\u7684\u662f\u4f3a\u670d\u5668\u7684\u7576\u524d\u65e5\u671f\u548c\u6642\u9593\uff0c\u683c\u5f0f\u70ba\u201cYYYY-MM-DD HH24:MI:SS\u201d\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528SYSDATE\u7684\u57fa\u672c\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT SYSDATE FROM dual;<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u5c07\u8fd4\u56de\u985e\u4f3c\u65bc\u201c2023-10-01 14:30:00\u201d\u7684\u7d50\u679c\uff0c\u9019\u8868\u793a\u7576\u524d\u7684\u7cfb\u7d71\u6642\u9593\u3002<\/p>\n<h2 id=\"2-%e4%bd%bf%e7%94%a8current_timestamp%e5%87%bd%e6%95%b8-OkjVMOivcG\">2. \u4f7f\u7528CURRENT_TIMESTAMP\u51fd\u6578<\/h2>\n<p>\u9664\u4e86SYSDATE\uff0cOracle\u9084\u63d0\u4f9b\u4e86CURRENT_TIMESTAMP\u51fd\u6578\uff0c\u9019\u500b\u51fd\u6578\u4e0d\u50c5\u8fd4\u56de\u7576\u524d\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u9084\u5305\u62ec\u6642\u5340\u4fe1\u606f\u3002\u9019\u5c0d\u65bc\u9700\u8981\u8003\u616e\u6642\u5340\u7684\u61c9\u7528\u5834\u666f\u975e\u5e38\u6709\u7528\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528CURRENT_TIMESTAMP\u7684\u67e5\u8a62\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT CURRENT_TIMESTAMP FROM dual;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u5c07\u986f\u793a\u7576\u524d\u7684\u65e5\u671f\u3001\u6642\u9593\u53ca\u5176\u6642\u5340\uff0c\u4f8b\u5982\u201c2023-10-01 14:30:00.000000 +08:00\u201d\u3002<\/p>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8dbtimezone%e5%92%8csessiontimezone-OkjVMOivcG\">3. \u4f7f\u7528DBTIMEZONE\u548cSESSIONTIMEZONE<\/h2>\n<p>\u5728Oracle\u4e2d\uff0cDBTIMEZONE\u548cSESSIONTIMEZONE\u7528\u65bc\u67e5\u8a62\u6578\u64da\u5eab\u548c\u6703\u8a71\u7684\u6642\u5340\u8a2d\u7f6e\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5728\u4e0d\u540c\u6642\u5340\u4e4b\u9593\u9032\u884c\u6578\u64da\u8655\u7406\u7684\u61c9\u7528\u975e\u5e38\u91cd\u8981\u3002<\/p>\n<ul>\n<li><strong>\u67e5\u8a62\u6578\u64da\u5eab\u6642\u5340\uff1a<\/strong><\/li>\n<pre><code>SELECT DBTIMEZONE FROM dual;<\/code><\/pre>\n<li><strong>\u67e5\u8a62\u6703\u8a71\u6642\u5340\uff1a<\/strong><\/li>\n<pre><code>SELECT SESSIONTIMEZONE FROM dual;<\/code><\/pre>\n<\/ul>\n<p>\u9019\u4e9b\u67e5\u8a62\u5c07\u8fd4\u56de\u7576\u524d\u6578\u64da\u5eab\u548c\u6703\u8a71\u7684\u6642\u5340\u8a2d\u7f6e\uff0c\u5e6b\u52a9\u7528\u6236\u4e86\u89e3\u6642\u9593\u7684\u4e0a\u4e0b\u6587\u3002<\/p>\n<h2 id=\"4-%e4%bd%bf%e7%94%a8to_char%e5%87%bd%e6%95%b8%e6%a0%bc%e5%bc%8f%e5%8c%96%e6%99%82%e9%96%93-OkjVMOivcG\">4. \u4f7f\u7528TO_CHAR\u51fd\u6578\u683c\u5f0f\u5316\u6642\u9593<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u7528\u6236\u53ef\u80fd\u9700\u8981\u4ee5\u7279\u5b9a\u683c\u5f0f\u986f\u793a\u6642\u9593\u3002Oracle\u7684TO_CHAR\u51fd\u6578\u53ef\u4ee5\u5c07\u65e5\u671f\u548c\u6642\u9593\u8f49\u63db\u70ba\u5b57\u7b26\u4e32\u683c\u5f0f\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528TO_CHAR\u683c\u5f0f\u5316SYSDATE\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT TO_CHAR(SYSDATE, 'YYYY-MM-DD HH24:MI:SS') AS formatted_date FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u683c\u5f0f\u5316\u5f8c\u7684\u65e5\u671f\u548c\u6642\u9593\uff0c\u4fbf\u65bc\u5728\u5831\u544a\u6216\u7528\u6236\u754c\u9762\u4e2d\u986f\u793a\u3002<\/p>\n<h2 id=\"5-%e4%bd%bf%e7%94%a8extract%e5%87%bd%e6%95%b8%e7%8d%b2%e5%8f%96%e6%99%82%e9%96%93%e7%b5%84%e4%bb%b6-OkjVMOivcG\">5. \u4f7f\u7528EXTRACT\u51fd\u6578\u7372\u53d6\u6642\u9593\u7d44\u4ef6<\/h2>\n<p>\u5982\u679c\u9700\u8981\u5f9e\u65e5\u671f\u4e2d\u63d0\u53d6\u7279\u5b9a\u7684\u6642\u9593\u7d44\u4ef6\uff08\u5982\u5e74\u3001\u6708\u3001\u65e5\u3001\u6642\u3001\u5206\u3001\u79d2\uff09\uff0c\u53ef\u4ee5\u4f7f\u7528EXTRACT\u51fd\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT EXTRACT(YEAR FROM SYSDATE) AS year,\n              EXTRACT(MONTH FROM SYSDATE) AS month,\n              EXTRACT(DAY FROM SYSDATE) AS day\n       FROM dual;<\/code><\/pre>\n<p>\u9019\u5c07\u8fd4\u56de\u7576\u524d\u5e74\u4efd\u3001\u6708\u4efd\u548c\u65e5\u671f\uff0c\u4fbf\u65bc\u9032\u4e00\u6b65\u7684\u6578\u64da\u8655\u7406\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OkjVMOivcG\">\u7e3d\u7d50<\/h2>\n<p>\u4e86\u89e3\u5982\u4f55\u67e5\u8a62Oracle\u7cfb\u7d71\u6642\u9593\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u61c9\u7528\u958b\u767c\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528SYSDATE\u3001CURRENT_TIMESTAMP\u3001DBTIMEZONE\u3001SESSIONTIMEZONE\u3001TO_CHAR\u548cEXTRACT\u7b49\u51fd\u6578\uff0c\u7528\u6236\u53ef\u4ee5\u9748\u6d3b\u5730\u7372\u53d6\u548c\u683c\u5f0f\u5316\u6642\u9593\u4fe1\u606f\u3002\u9019\u4e9b\u67e5\u8a62\u65b9\u6cd5\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u8655\u7406\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u7528\u6236\u66f4\u597d\u5730\u7406\u89e3\u548c\u7ba1\u7406\u6642\u9593\u76f8\u95dc\u7684\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u67e5\u8a62\u7576\u524dOracle\u7cfb\u7d71\u6642\u9593\uff0c\u638c\u63e1SQL\u6307\u4ee4\u53ca\u5be6\u7528\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5eab\u7ba1\u7406\u6548\u7387\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-153909","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153909","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=153909"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153909\/revisions"}],"predecessor-version":[{"id":153910,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/153909\/revisions\/153910"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=153909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=153909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=153909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}